| eqb | eSignal Quote Board Data |
| eqbak | EQATEC Profiler Data |
| eqd | Microsoft SQL English Query Domain Data |
| eqd | EquineMax Data |
| eqf | Equalization Filters File |
| eqlog | EQATEC Profiler Log |
| eqn | KaleidaGraph Macro |
| equ | AstroDigital.Net Equipment File |
| eqv | IDL EQV Equation Data |
| eqw | SPEFO Equivalent Widths Data |
| er | E-Cell 2 Rule Data |
| era | Electronic Remittance Advice Data |
| erdplus | ERDPlus Database Model |
| erg | CompuTrainer Ergometer Test |
| err | Error Log File |
| es | E-Prime E-Studio 1.x Experiment File |
| es2 | E-Prime E-Studio 2.x Experiment File |
| esb | Es-Builder Book |
| escopy | ES Explorer Temporary File |
| ese | Millions Email Generator Email List |
| esf | Steganos Password Manager Container File |
| esi | USoft Application Resources Data |
| eslock | ES File Explorer Encrypted Data |
| esn | Windows XP Cache Data |
| eso | EnergyPlus Simulation Output |
| esobi | NewsXpresso Data |
| esp | ACD/Labs Dataset |
| espass | Electronic smartPass Data |
| esr | 4D Database External |
| est | Streets & Trips Map Data |
| estg | STAR-CCM+ Geometry File |
| esw | AGTEK Earthwork 3D Data |
| esw | Turbo Smetchik Data |
| esx | Xactimate Insurance Claims Estimate |
| esz | AGTEK Zipped ESW Data |
